Home / 145,152,021.90-217,728,032.85-128,145,909.90

Finding the Fourth Proportional to 145,152,021.90, 217,728,032.85 and 128,145,909.90

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Solution

The fourth proportional to 145,152,021.90, 217,728,032.85 and 128,145,909.90 is: 192,218,864.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,152,021.90 : 217,728,032.85 = 128,145,909.90 : x
  2. Step 2: Convert to fraction form
    145,152,021.90/217,728,032.85 = 128,145,909.90/x
  3. Step 3: Cross multiply
    145,152,021.90x = 217,728,032.85 × 128,145,909.90
  4. Step 4: Simplify right side
    145,152,021.90x = 27,900,956,880,300,340
  5. Step 5: Solve for x
    x = 27,900,956,880,300,340/145,152,021.90
  6. Step 6: Final answer
    x = 192,218,864.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.